Changes between Version 53 and Version 54 of WANMAC

Timestamp:

Jul 24, 2006, 12:27:50 PM (18 years ago)

Author:

varunnayyar

Comment:

--

WANMAC

@@ -326 +326 @@
 
 
-
-
-
+'''Allocating Memory''' 
+
+Create a buffer of Desired WIDTH and HEIGHT.
+Use Bufmalloc from that buffer.
+Also free into that buffer. 
+
+''Tips ''
+
+1) Ensure that for every allocation, there 
+is a corresponding free.
+
+2) If the WIDTH and HEIGHT values are too
+high, their will be a compilation error !!
+
+3) Every time we do a malloc, capture 
+the Status Message returned and print
+it out.
+
+Some useful ''code snippet'' for the above:
+
+#define BUFWIDTH 45
+#define BUFHEIGHT 2096
+static  membuf_t mbuft;
+char    membuf[BUFWIDTH][BUFHEIGHT] __attribute__ ((aligned(4)));
  
-
+''Creating the Buffer''
+  
+  int var;  
+  var = bufcreate (&mbuft, membuf, BUFWIDTH, BUFHEIGHT);
+  if (var == -1){
+    xil_printf ("Error while creating memory pool. Errno: %d.\r\r\n", errno);
+    ;
+  }
+
+''Destroying the Buffer''
+
+ bufdestroy (mbuft);
+
+''Allocation Example and Capturing'' 
+
+  data = (unsigned char*)bufmalloc(mbuft,sizeof(char) * (data length));
+  if (data == 0) {
+    xil_printf ("Error allocating Errno: %d.\r\n", errno);
+    ;
+  }
+
+''Deallocation'' : Again using mbuft
+
+  buffree(mbuft,data);
+
+
+'''Printing out stuff on the Terminal'''
+
+We can use any terminal display for that. 
+
+1) Ensure it is connected to the the right Serial Port.
+(COMM1 / COMM2)
+
+2) Use the baud rate of 57600, else you will
+see SYMBOLS instead of alphanumerics
+
+3) Making LOGS: When priting out huge stuff,
+use File->Log of the Terminal. You can pause
+the logging process in between.
+
+4) use xil_printf(), it has the same parameters
+%d %x %c etc like printf. For NEWLINE, use both 
+\r\n.
+
+
+'''Using Buttons on the Board''' for triggering Interrupt,
+sp that we can see things ..
+ 
+            B3
+         B2 B1 B5
+            B4
+
+see the code of pb_handler()
+
+
+
+ 
+